SAM 15x15 main advantages

It has much more I/O pins than other comparable SAMD21G boards, 34 instead of 21.

It can be reduced in size as desired to 22x22mm or 15x15mm.

For hobbyists, the drawback of the SAMD21 is that it is only available in SMD. When blown up, it is pretty tough to replace it because no IC socket can be used. This can be solved with the SAM 15x15 board, which transforms the SAMD21G into a pin version.

Straightforward pinout

The PCB pinout is straightforward because it is more or less the same as that of the SAMD21G chip itself. The pins of the SAMD21G are not jumbled together but are arranged logically, as we can see below.

Review Breakdown

Average Ratings

very nice piece of hardware

Extremely easy to use with arduino IDE, works like a charm, you'll need some skill to solder to your pcb but hey, you have seen the pictures right? I used the 15x15 configuration that I obtained by sanding away the larger part of the board that was shipped to me, that operation didnt damage the chip and/or the connections integrity. Very satisfied!

Excellent product for prototyping

Beautiful board, however.....

Albert did a _really_ nice job designing the SAM 15 X 15 board, but it gets messy from there. The documentation is all over the place on his website. It's not obvious which libraries one needs to get the board up and running. He has one large zip file that has all the "needed" libraries in it but many of libraries are by other vendors, and doing a straight copy overwrites what my be important without knowing it until later on. It would be nice if he spent the time to put all the examples strewn around his website into an example folder. Doubly nice if he spent the time put all his libraries in order per Arduino spec. There's a reason I love Paul's work on the Teensy, but truth be told if Albert can get the doc/libraries for the SAM 15 X 15 in order it's hard to beat for the size.

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